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From: "Martin Dowie" <martin.dowie@nospam.baesystems.com>
Newsgroups: comp.lang.ada
References: <Ad6R6.1259$DG1.337725@news1.rdc1.mi.home.com>
Subject: Re: Cannot use NULL as identifier?
Date: Wed, 30 May 2001 14:32:34 +0100
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Date: 2001-05-30T14:32:34+01:00
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ASCII is an obsolete package, use Ada.Characters.Latin_1 instead.
The other problem you have is 'NULL' with 2 'L' characters. So what
you need is:

  FilePath : constant string := "tesfile.xxx" & Ada.Characters.Latin_1.Nul;

Alternatively, it looks like you're trying to do things in a 'C'-way,
or interface with some 'C' routines, so have a look at Interfaces.C (and
maybe Interfaces.C.Strings) to find routines to create nul-terminated
strings.

Enjoy!

McDoobie <someone@nospam.net> wrote in message
news:Ad6R6.1259$DG1.337725@news1.rdc1.mi.home.com...
> I've written a small program that parses the contents of different
> directories and searches for duplicate files.
>
> I have an assignment that reads
>
> FilePath : constant string := "tesfile.xxx" & ASCII.NULL;
>
> Now, the GNAT compiler on Linux gives me the error
> "reserved word NULL cannot be used as identifier "
>
> Now, I'm using the text_io and gnat.os_lib libraries to compile this, so
> I'm assuming that os_lib makes an allowance for this. However, I could be
> mistaken. I ripped the above code fragement from a website, and the
> website (the Big Book of Linux Ada programming) doesnt appear to  indicate
> that theres a problem with this. (Of course I probably overlooked
> something.)
>
> I'm also searching through "Programming in Ada95"(Barnes) trying to find
> info on this error.
>
> Any tips or pointers would be helpful.
>
> Thanks.
>
> McDoobie
> Chris@dont.spam.me